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#include <grp.h>
#include <pwd.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
int
main (int argc, char *argv[])
{
uid_t me;
struct passwd *my_passwd;
struct group *my_group = NULL;
char **members;
me = getuid ();
my_passwd = getpwuid (me);
if (my_passwd == NULL)
printf ("Cannot find user entry for UID %d\n", me);
else
{
printf ("My login name is %s.\n", my_passwd->pw_name);
printf ("My uid is %d.\n", (int)(my_passwd->pw_uid));
printf ("My home directory is %s.\n", my_passwd->pw_dir);
printf ("My default shell is %s.\n", my_passwd->pw_shell);
my_group = getgrgid (my_passwd->pw_gid);
if (my_group == NULL)
printf ("No data for group %d found\n", my_passwd->pw_gid);
else
{
printf ("My default group is %s (%d).\n",
my_group->gr_name, (int)(my_passwd->pw_gid));
printf ("The members of this group are:\n");
for (members = my_group->gr_mem; *members != NULL; ++members)
printf (" %s\n", *members);
}
}
return my_passwd && my_group ? EXIT_SUCCESS : EXIT_FAILURE;
}
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